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A refill for dispensing a volatile material includes a bottle having a body defined by at least one sidewall and a neck extending outwardly from the at least one sidewall. The neck includes a rim at an upper end thereof, the neck being defined by an inner surface, a top surface, and an outer surface

A refill for dispensing a volatile material includes a bottle having a body defined by at least one sidewall and a neck extending outwardly from the at least one sidewall. The neck includes a rim at an upper end thereof, the neck being defined by an inner surface, a top surface, and an outer surface. The refill further includes a plug and a wick having a first end positioned within the bottle and a second end extending out of the bottle, the wick further defining a longitudinal axis. The plug is coupled to the neck of the bottle, the plug retaining the wick within the bottle. At least a portion of the inner surface of the rim is tapered at an angle of between about 2 and about 9 degrees with respect to the longitudinal axis.

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1. A refill for dispensing a volatile material, comprising: a bottle comprising: a body defined by at least one sidewall; anda neck extending outwardly from the at least one sidewall, the neck comprising a rim at an upper end of the neck, wherein the rim is defined by an inner surface, a chamfered s

1. A refill for dispensing a volatile material, comprising: a bottle comprising: a body defined by at least one sidewall; anda neck extending outwardly from the at least one sidewall, the neck comprising a rim at an upper end of the neck, wherein the rim is defined by an inner surface, a chamfered surface, a top surface, and an outer surface,a wick having a first end positioned within the bottle and a second end extending out of the bottle, the wick further defining a longitudinal axis;a plug coupled to the neck of the bottle, the plug retaining the wick within the bottle; andwherein the chamfered surface adjoins the inner surface of the rim, andwherein the entire chamfered surface is tapered at an angle of between about 2 and about 9 degrees with respect to the longitudinal axis. 2. The refill of claim 1 further including a cap threadably engaged with the neck. 3. The refill of claim 1, wherein the rim further includes an angled surface that joins the top surface and the chamfered surface of the rim, wherein the angled surface is disposed at an angle of between about 30 degrees and about 70 degrees with respect to the longitudinal axis. 4. The refill of claim 1, wherein the plug is defined by an inner wall forming a portion of a sheath around the wick, a lower wall joining the inner wall with an intermediate wall, and an upper wall joining the intermediate wall with an outer wall. 5. The refill of claim 4, wherein the inner wall, the lower wall, and the intermediate wall of the plug form a well, and wherein a skirt of a cap is received within the well when the cap is secured to the refill. 6. The refill of claim 1, wherein the chamfered surface of the rim is tapered at an angle of between 4.5 and 6.5 degrees. 7. The refill of claim 1 further comprising a cap threadably attached to the neck of the bottle, wherein an annular skirt of the cap extends into a well formed by one or more walls of the plug, andwherein the annular skirt applies a force to a portion of the plug to reduce hoop stress in the neck of the bottle. 8. The refill of claim 7, wherein the skirt is in contact with a lower wall of the plug after the cap is secured to the bottle. 9. The refill of claim 1, wherein a volatile material including at least one fragrance oil is disposed within the body of the bottle. 10. The refill of claim 1, wherein a first annular protrusion is disposed along the outer surface of the rim between threading along the neck and the top surface of the rim, the first annular protrusion configured to interact with a second annular protrusion on the plug to secure the plug on the neck of the refill. 11. A refill for dispensing a volatile material, comprising: a bottle comprising: a body defined by at least one sidewall;a neck extending outwardly from the at least one sidewall, the neck comprising: threading circumscribing at least a portion of the neck; anda rim at an upper end of the neck, the rim defined by an inner surface, a chamfered surface, an outer surface, and a top surface extending between the inner and outer surfaces;a channel formed by the neck, a longitudinal axis being defined by the channel;a wick having a first end positioned within the bottle and a second end extending out of the bottle, the wick being positioned within the channel;a plug coupled to the neck of the bottle, the plug retaining the wick within the bottle and comprising a well formed by walls of the plug; anda cap attached to the bottle, the cap comprising a seal skirt that extends into the well when the cap is secured to the bottle,wherein the chamfered surface extends from the inner surface of the rim, andwherein the entire chamfered surface is tapered outward from the longitudinal axis at an angle of between about 3 and about 8 degrees with respect to the longitudinal axis. 12. The refill of claim 11, wherein the plug comprises first and second spaced apart walls positioned within the channel and a lower wall connecting ends of the first and second spaced apart walls, with the well being formed by the first, second, and lower walls, wherein the seal skirt is in contact with at least one of the first and second spaced apart walls of the plug after the cap is secured to the bottle. 13. The refill of claim 11, wherein an inner surface of a securement portion of the cap includes a second thread that is capable of threadable engagement with the threading circumscribing the neck of the bottle. 14. The refill of claim 11, wherein a volatile material including at least one fragrance oil is disposed within the body of the bottle. 15. The refill of claim 11, wherein a first annular protrusion is disposed along the outer surface of the rim between the threading and the top surface of the rim. 16. The refill of claim 15, wherein a second annular protrusion is disposed along an inner surface of an outer wall of the plug, wherein the second annular protrusion snaps over the first annular protrusion to retain the plug on the neck of the refill. 17. The refill of claim 11, wherein the chamfered surface of the rim is tapered at an angle of 6 degrees. 18. The refill of claim 11, wherein the bottle is made of a polymer. 19. The refill of claim 11, wherein the plug further includes a sheath extending from a base of the plug, wherein the sheath covers more than half of an upper portion of the wick. 20. The refill of claim 19, wherein the chamfered surface of the rim is tapered around the entire rim. 21. The refill of claim 11, wherein the rim further includes an angled surface that joins the top surface and the chamfered surface of the rim, wherein the angled surface is disposed at an angle of between about 30 degrees and about 70 degrees with respect to the longitudinal axis.